Piston-rod lubricator.



l s. R. LAvoo. PISTON ROD LUBRICATOR. APPLCATION FILED OCT. 20, |915.

1,182,777.n f Patented May-9,1916.

' D As'ra'rns raf STANLEY B. LAVOO, OFHANIBAL, MISCUR.

PISTQN-ROD LUBPYJIGTGR.

Specification of Letters Patent. l

Patented. May 9, 1916.

.Application filed October 2i?, 1215. Sca No. 56,971.

To 0.53 whom t may concern:

Ee it known that I, STANLEY R. Lnvoo, a citizen of the United States, residing at Hannibal, in the county of Marion and of liiissonrn have invented certain new and useful improvements in Piston-l Rod l'iubricators;4 and l; do hereby7 declare the following to Vbe a ruil, clear, and exact description of the invention, such as will.

enable others skilled in the art to which Ait appertains to make and use the same.

The invention relates to improvements in piston rod lubricators. l

The obgect of the present invention is to improve the construction of piston rod lubricators and to provide a simple, practical and' comparatively inexpensive piston rod lubricator adapted to obviate the necessity of employing oil cups and the frequent filling of the same and capable oi' a-utq matic operation by a piston rod tofeed a lubricant to the same and to return a portion ci' the lubricant back to the piston after it has been fed thereto `and dripped there-V A. iiurtlier object of the invention is to provide a piston .rod lubricator of this character capable of ready adjustment to adapt the feed of the lubricant to the requirements of the piston rod whereby the latter will vbe positively and uniformly lubricated to the tion of a piston rod lubricator constructed in accordance with this invention and shown applied to a piston rod, Fig. 2 is an enlargedv iongitudinai lubricator. v

Like numerals of reference designate corresponding partsin the several igures of the drawing.

In the accompanying drawing in which is illustrated the preferred embodiment of the invention, 1 designates a horizontally disposed `pump cylinder provided at one end v bushing or gland 8 sectional view through the' with upwardly and downwardly extending tubular portions 2 and 3 provided with bores or openings 4 and 5 which communicate with-the interior of the pump cylinder. The upper tubular extension 2 is counter-bored to provide a valve seat 6 andto receive a check lvalve 1' preferably consisting oi a, ball, the seat being beveled as shown. The' counter-bored portion of the upper tubular portion 2 is interiorly threaded to receive which is interiorly threaded at 9 to receive the threaded enr 10 of a feed pipe 11 extending to and terminating at a point above a piston rod 'i2 whereby when al plunger 13 is moved inwardly lubricant within the pump cylinder 1 will 'be forced outwardly through the feed or supply pipe 11 'and cause it to drip upon the piston rod.

The lower depending or downwardly extending tubular portion is reduced to nt' anopening 14 in a bracket 15 and is thro-afled below. the reduced portion 14 te vreceive a valve casing 16 which .is screwed against the bracket' whereby the pump cylinder is firmly secured to the same. The bracket 15 is mounted on one of the cross head guides 17 and the valve casing 16 which is provided with an interior valve chamber 18 has avalve seat ll9at the bottomthe'freof to receive a suction operated valve 2OY which is adapted to open on the o utward movement ofl the plunger 13, the check valve remaining closed during 'such amovement to pervmit the plunger; to ldraw into thecylinder 1 oil from a receptacle 21. -Thelower end of the valve casing 16 is bored and threaded at 22 to receive one end of a return pipe 23 which extends from the receptacle 21 to the lower tubular portion of the pump C-ylinn der 1. The receptacle 21 is located below the piston rod and is adapted to receive .oil

dripping therefrom and it is adapted to supplied from time t0 time las required.l -Y f The cylinder` 1, is threaded at its outer portion 24 for'the reception ,of a 'stuiling box 25 and theouter portion of the plunger 13 has a threaded bore or opening 26 for the reception of a threaded portion 27 olfA an ad justable rodor member 28' located in the path of the cross head 29 and adapted to be engaged and moved inwardly by the same for operating the plunger 13. duringthe feeding movement thereof. 'il

The return or outward movement 'of the plunger is effected by means 0f a coiled l lll H immuun i,

spring@ disposed Yon the uter portion of the plunger 13 and interposed between a nut 3l and the: stuffing boX 25.

which is arranged von the threaded "portion of Y:the adjustable rod or member abuts against the outer end of the'plungc'r. 13 andA :'ser\;e\s'=3as;a-lock nut and also as a; stop orv abutment for the outer end of the spring 80.A The outward movement of the plunger 13 islimited by ai relatively fixed stop 32 Y consisting of a lug; or projection extending from an arm or rod 33. The rod or arm 33 A' is securedat its inner end 34 by screws or f is other suitable fastening devices to the pump cylinder l.Y The stop 32 limits the outward movement of the plunger i3 'and the stroke thereof is regulated by the adjustable rod or member 28 ivhich adapted to be screwed inwardly Eor outwardly as required.

While the lubricator is designed particu- -larly for 'use on compressors it is adapted for lubricating piston rods of engines and various other machines. jWhat 1s Yclaimed is z- 1. A-lubricator of thec'lass described iiicluding a cylinder, a plunger operating in the cylinder and provided at its outer end with means for engagement with a reciproeating pagrt of engine for actuating the plunger in one direction, a coiled spring disposed on the plunger for moving the same in the opposite direction, feed and return pipes connectedwith the cylinder and check valves for the said pipes.

2. lubric'ator of-"the class described including a cylinder, a plunger operating ini the cylinder, and having a threaded 1bore, an

adjustable member having a threaded poradjustable member havinga threaded portion operating in the bore; a lock nut arranged on the threaded portion Iof the said member angl engaging the plunger and a spring disposed on the plunger and bearing against the lock nut for urging ithe plunger in one direction and anarm secured to cylinder and having a projecting lug arrangedin the path of thefnutzfor limiting the outward movement ofrthe plunger.

In testimony hereof l affix my signature in presence of tivo Witnesses.v

` L riTANLEY LAVOO.

'Vitnesses: o

Mrs. R. N. GILBERT, Louise Hons'rMnYiiii. 

